Trim arenas for JIT
Moved arena pool into the runtime. Added arena trimming to arena
pool. When called, this madvises the used memory.
Changed the JIT compiler to trim arenas after compilation. Changed
the arena mmap name to dalvik-LinearAlloc.
Native PSS before:
80353 kB: Native
80775 kB: Native
78116 kB: Native
After:
73357 kB: Native
70181 kB: Native
70306 kB: Native
Bug: 17950037
Bug: 17643507
Bug: 19264997
Change-Id: I63e7a898fd6e909c2c677fa57b5917a7b1398930
diff --git a/compiler/jit/jit_compiler.cc b/compiler/jit/jit_compiler.cc
index 04efa21..a63e14a 100644
--- a/compiler/jit/jit_compiler.cc
+++ b/compiler/jit/jit_compiler.cc
@@ -103,7 +103,7 @@
}
bool JitCompiler::CompileMethod(Thread* self, mirror::ArtMethod* method) {
- uint64_t start_time = NanoTime();
+ const uint64_t start_time = NanoTime();
StackHandleScope<2> hs(self);
self->AssertNoPendingException();
Runtime* runtime = Runtime::Current();
@@ -130,6 +130,8 @@
}
}
CompiledMethod* compiled_method(compiler_driver_->CompileMethod(self, h_method.Get()));
+ // Trim maps to reduce memory usage, TODO: measure how much this increases compile time.
+ runtime->GetArenaPool()->TrimMaps();
if (compiled_method == nullptr) {
return false;
}
@@ -137,7 +139,7 @@
// Don't add the method if we are supposed to be deoptimized.
bool result = false;
if (!runtime->GetInstrumentation()->AreAllMethodsDeoptimized()) {
- const void* code = Runtime::Current()->GetClassLinker()->GetOatMethodQuickCodeFor(
+ const void* code = runtime->GetClassLinker()->GetOatMethodQuickCodeFor(
h_method.Get());
if (code != nullptr) {
// Already have some compiled code, just use this instead of linking.